Old paramilitaries, each drinking pale port (7)
I believe the answer is:
swansea
'port' is the definition.
(I know that Swansea is a port)
'old paramilitaries each drinking pale' is the wordplay.
'old paramilitaries' becomes 'ss' (I can't explain this - if you can you should give a lot more credence to this answer).
'each' becomes 'ea' (abbreviation).
'drinking' means one lot of letters goes inside another (inserted letters are consumed or drunk).
'pale' becomes 'wan' (wan can mean pale or grey).
'ss'+'ea'='ssea'
'ssea' enclosing 'wan' is 'SWANSEA'.
Can you help me to learn more?
(Other definitions for swansea that I've seen before include "coastal location" , "Home of the DVLA" , "South Wales port" , "South Wales city" , "Welsh port" .)